word | | Geography - note |
| boundary | Lebanon | Nahr el Litani is the only major river in Near East not crossing an international boundary; rugged terrain historically helped isolate, protect, and develop numerous factional groups based on religion, clan, and ... |
| boundary | Zambia | landlocked; the Zambezi forms a natural riverine boundary with Zimbabwe; Lake Kariba on the Zambia-Zimbabwe border forms the world's largest reservoir by volume (180 cu km; 43 cu mi) |
| boundary | Zimbabwe | landlocked; the Zambezi forms a natural riverine boundary with Zambia; in full flood (February-April) the massive Victoria Falls on the river forms the world's largest curtain of falling water; Lake ... |
| Brahmaputra | Bangladesh | ... deltas of large rivers flowing from the Himalayas: the Ganges unites with the Jamuna (main channel of the Brahmaputra) and later joins the Meghna to eventually empty into the Bay of Bengal |
| Brazil | Argentina | second-largest country in South America (after Brazil); strategic location relative to sea lanes between the South Atlantic and the South Pacific Oceans (Strait of Magellan, Beagle Channel, Drake Passage); diverse geophysical ... |
| Brazil | Paraguay | landlocked; lies between Argentina, Bolivia, and Brazil; population concentrated in southern part of country |
| Brazzaville | Congo, Republic of the | about 70% of the population lives in Brazzaville, Pointe-Noire, or along the railroad between them |
| breeding | Saint Helena | ... Helena harbors at least 40 species of plants unknown elsewhere in the world; Ascension is a breeding ground for sea turtles and sooty terns; Queen Mary's Peak on Tristan da Cunha ... |
| breeze | Australia | ... the only continent without glaciers; population concentrated along the eastern and southeastern coasts; the invigorating sea breeze known as the "Fremantle Doctor" affects the city of Perth on the west coast and ... |
| bridge | Egypt | controls Sinai Peninsula, only land bridge between Africa and remainder of Eastern Hemisphere; controls Suez Canal, a sea link between Indian Ocean and Mediterranean Sea; size, and juxtaposition to Israel, establish its ... |
| bridge | Panama | strategic location on eastern end of isthmus forming land bridge connecting North and South America; controls Panama Canal that links North Atlantic Ocean via Caribbean Sea with North Pacific Ocean |